1/*
2**
3** Copyright 2015, The Android Open Source Project
4**
5** Licensed under the Apache License, Version 2.0 (the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing, software
12** distributed under the License is distributed on an "AS IS" BASIS,
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18//#define LOG_NDEBUG 0
19#define LOG_TAG "ServiceLog"
20#include <utils/Log.h>
21
22#include <time.h>
23
24#include "ServiceLog.h"
25
26static const size_t kDefaultMaxNum = 100;
27
28namespace android {
29
30ServiceLog::ServiceLog() : mMaxNum(kDefaultMaxNum), mLogs(mMaxNum) {}
31ServiceLog::ServiceLog(size_t maxNum) : mMaxNum(maxNum), mLogs(mMaxNum) {}
32
33void ServiceLog::add(const String8 &log) {
34    Mutex::Autolock lock(mLock);
35    time_t now = time(0);
36    char buf[64];
37    strftime(buf, sizeof(buf), "%m-%d %T", localtime(&now));
38    mLogs.add(String8::format("%s %s", buf, log.string()));
39}
40
41String8 ServiceLog::toString(const char *linePrefix) const {
42    Mutex::Autolock lock(mLock);
43    String8 result;
44    for (const auto& log : mLogs) {
45        addLine(log.string(), linePrefix, &result);
46    }
47    if (mLogs.size() == mMaxNum) {
48        addLine("...", linePrefix, &result);
49    } else if (mLogs.size() == 0) {
50        addLine("[no events yet]", linePrefix, &result);
51    }
52    return result;
53}
54
55void ServiceLog::addLine(const char *log, const char *prefix, String8 *result) const {
56    if (prefix != NULL) {
57        result->append(prefix);
58    }
59    result->append(log);
60    result->append("\n");
61}
62
63} // namespace android
64